Key issues for long-pulse high-β N operation with the Experimental Advanced Superconducting Tokamak (EAST)

Xiang Gao; Yao Yang; Tao Zhang; Haiqing Liu; Guoqiang Li; Tingfeng Ming; Zixi Liu; Yumin Wang; Long Zeng; Xiang Han; Yukai Liu; Muquan Wu; Hao Qu; Biao Shen; Qing Zang; Yaowei Yu; Defeng Kong; Wei Gao; Ling Zhang; Huishan Cai; Xuemei Wu; K. Hanada; Fubin Zhong; Yunfeng Liang; Chundong Hu; Fukun Liu; Xianzhu Gong; Bingjia Xiao; Baonian Wan; Xiaodong Zhang; Jiangang Li

doi:10.1088/1741-4326/aa626c

Key issues for long-pulse high-β _N operation with the Experimental Advanced Superconducting Tokamak (EAST)

Xiang Gao, Yao Yang, Tao Zhang, Haiqing Liu, Guoqiang Li, Tingfeng Ming, Zixi Liu, Yumin Wang, Long Zeng, Xiang Han, Yukai Liu, Muquan Wu, Hao Qu, Biao Shen, Qing Zang, Yaowei Yu, Defeng Kong, Wei Gao, Ling Zhang, Huishan CaiXuemei Wu, K. Hanada, Fubin Zhong, Yunfeng Liang, Chundong Hu, Fukun Liu, Xianzhu Gong, Bingjia Xiao, Baonian Wan, Xiaodong Zhang, Jiangang Li

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Abstract

In the last few years, long-pulse H-mode plasma discharges (with small edge-localized modes and normalized beta, β _N ∼ 1) have been realized at the Experimental Advanced Superconducting Tokamak (EAST). This paper reports on high-β _N (>1.5) discharges in the 2015 EAST campaign. The characteristics of these H-mode plasmas have been presented in a database. Analysis of the experimental limit of β _N has revealed several main features of typical discharges. Firstly, efficient, stable high heating power is required. Secondly, control of impurity radiation (partly due to interaction between the plasma and the in-vessel components) is also a critical issue for the maintenance of high-β _N discharges. In addition an internal transport barrier (ITB) has recently been observed in EAST, introducing further improvement in confinement surpassing H-mode plasmas. ITB dynamics is another key issue for high-β _N plasmas in EAST. Each of these features is discussed in this paper. Study and improvement of these issues could be considered as the key to achieving long-pulse high-β _N operation with EAST.

Original language	English
Article number	056021
Journal	Nuclear Fusion
Volume	57
Issue number	5
DOIs	https://doi.org/10.1088/1741-4326/aa626c
Publication status	Published - Mar 24 2017

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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10.1088/1741-4326/aa626c

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Gao, X., Yang, Y., Zhang, T., Liu, H., Li, G., Ming, T., Liu, Z., Wang, Y., Zeng, L., Han, X., Liu, Y., Wu, M., Qu, H., Shen, B., Zang, Q., Yu, Y., Kong, D., Gao, W., Zhang, L., ... Li, J. (2017). Key issues for long-pulse high-β _N operation with the Experimental Advanced Superconducting Tokamak (EAST). Nuclear Fusion, 57(5), [056021]. https://doi.org/10.1088/1741-4326/aa626c

Gao, X, Yang, Y, Zhang, T, Liu, H, Li, G, Ming, T, Liu, Z, Wang, Y, Zeng, L, Han, X, Liu, Y, Wu, M, Qu, H, Shen, B, Zang, Q, Yu, Y, Kong, D, Gao, W, Zhang, L, Cai, H, Wu, X, Hanada, K, Zhong, F, Liang, Y, Hu, C, Liu, F, Gong, X, Xiao, B, Wan, B, Zhang, X & Li, J 2017, 'Key issues for long-pulse high-β _N operation with the Experimental Advanced Superconducting Tokamak (EAST)', Nuclear Fusion, vol. 57, no. 5, 056021. https://doi.org/10.1088/1741-4326/aa626c

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title = "Key issues for long-pulse high-β N operation with the Experimental Advanced Superconducting Tokamak (EAST)",

abstract = "In the last few years, long-pulse H-mode plasma discharges (with small edge-localized modes and normalized beta, β N ∼ 1) have been realized at the Experimental Advanced Superconducting Tokamak (EAST). This paper reports on high-β N (>1.5) discharges in the 2015 EAST campaign. The characteristics of these H-mode plasmas have been presented in a database. Analysis of the experimental limit of β N has revealed several main features of typical discharges. Firstly, efficient, stable high heating power is required. Secondly, control of impurity radiation (partly due to interaction between the plasma and the in-vessel components) is also a critical issue for the maintenance of high-β N discharges. In addition an internal transport barrier (ITB) has recently been observed in EAST, introducing further improvement in confinement surpassing H-mode plasmas. ITB dynamics is another key issue for high-β N plasmas in EAST. Each of these features is discussed in this paper. Study and improvement of these issues could be considered as the key to achieving long-pulse high-β N operation with EAST.",

author = "Xiang Gao and Yao Yang and Tao Zhang and Haiqing Liu and Guoqiang Li and Tingfeng Ming and Zixi Liu and Yumin Wang and Long Zeng and Xiang Han and Yukai Liu and Muquan Wu and Hao Qu and Biao Shen and Qing Zang and Yaowei Yu and Defeng Kong and Wei Gao and Ling Zhang and Huishan Cai and Xuemei Wu and K. Hanada and Fubin Zhong and Yunfeng Liang and Chundong Hu and Fukun Liu and Xianzhu Gong and Bingjia Xiao and Baonian Wan and Xiaodong Zhang and Jiangang Li",

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doi = "10.1088/1741-4326/aa626c",

language = "English",

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T1 - Key issues for long-pulse high-β N operation with the Experimental Advanced Superconducting Tokamak (EAST)

AU - Gao, Xiang

AU - Yang, Yao

AU - Zhang, Tao

AU - Liu, Haiqing

AU - Li, Guoqiang

AU - Ming, Tingfeng

AU - Liu, Zixi

AU - Wang, Yumin

AU - Zeng, Long

AU - Han, Xiang

AU - Liu, Yukai

AU - Wu, Muquan

AU - Qu, Hao

AU - Shen, Biao

AU - Zang, Qing

AU - Yu, Yaowei

AU - Kong, Defeng

AU - Gao, Wei

AU - Zhang, Ling

AU - Cai, Huishan

AU - Wu, Xuemei

AU - Hanada, K.

AU - Zhong, Fubin

AU - Liang, Yunfeng

AU - Hu, Chundong

AU - Liu, Fukun

AU - Gong, Xianzhu

AU - Xiao, Bingjia

AU - Wan, Baonian

AU - Zhang, Xiaodong

AU - Li, Jiangang

PY - 2017/3/24

Y1 - 2017/3/24

N2 - In the last few years, long-pulse H-mode plasma discharges (with small edge-localized modes and normalized beta, β N ∼ 1) have been realized at the Experimental Advanced Superconducting Tokamak (EAST). This paper reports on high-β N (>1.5) discharges in the 2015 EAST campaign. The characteristics of these H-mode plasmas have been presented in a database. Analysis of the experimental limit of β N has revealed several main features of typical discharges. Firstly, efficient, stable high heating power is required. Secondly, control of impurity radiation (partly due to interaction between the plasma and the in-vessel components) is also a critical issue for the maintenance of high-β N discharges. In addition an internal transport barrier (ITB) has recently been observed in EAST, introducing further improvement in confinement surpassing H-mode plasmas. ITB dynamics is another key issue for high-β N plasmas in EAST. Each of these features is discussed in this paper. Study and improvement of these issues could be considered as the key to achieving long-pulse high-β N operation with EAST.

AB - In the last few years, long-pulse H-mode plasma discharges (with small edge-localized modes and normalized beta, β N ∼ 1) have been realized at the Experimental Advanced Superconducting Tokamak (EAST). This paper reports on high-β N (>1.5) discharges in the 2015 EAST campaign. The characteristics of these H-mode plasmas have been presented in a database. Analysis of the experimental limit of β N has revealed several main features of typical discharges. Firstly, efficient, stable high heating power is required. Secondly, control of impurity radiation (partly due to interaction between the plasma and the in-vessel components) is also a critical issue for the maintenance of high-β N discharges. In addition an internal transport barrier (ITB) has recently been observed in EAST, introducing further improvement in confinement surpassing H-mode plasmas. ITB dynamics is another key issue for high-β N plasmas in EAST. Each of these features is discussed in this paper. Study and improvement of these issues could be considered as the key to achieving long-pulse high-β N operation with EAST.

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M1 - 056021

ER -

Key issues for long-pulse high-β _N operation with the Experimental Advanced Superconducting Tokamak (EAST)

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